This Black Obsidian Stone Gold PVD Captive Bead Ring is made from the highest quality 316L stainless steel and finished with a Gold PVD coating. The ring features a luxurious Black Obsidian bead, available in three different sizes: 5/16" (8mm), 3/8" (10mm), and 7/16" (11mm). Each piece is individually sold (1 piece).